Investments, Debt and Equity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	$ 40,700	$ 25,800
Debt securities, available-for-sale, gross unrealized gains	262	84
Debt securities, available-for-sale, gross unrealized losses	(352)	(366)
Available-for-sale debt securities:	40,610	25,518
Less than one year	21,037
Less than one year	21,267
One year through five years	17,335
One year through five years	17,210
Six years through ten years	534
Six years through ten years	492
After ten years	1,794
After ten years	1,641
Total	40,700
Total	40,610
Marketable equity securities:	10,276	18,110
United States Government and agency securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	40,123	25,485
Debt securities, available-for-sale, gross unrealized gains	262	84
Debt securities, available-for-sale, gross unrealized losses	(295)	(315)
Available-for-sale debt securities:	40,090	25,254
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	577	315
Debt securities, available-for-sale, gross unrealized gains	0	0
Debt securities, available-for-sale, gross unrealized losses	(57)	(51)
Available-for-sale debt securities:	$ 520	$ 264